diff --git a/installers/charm/prometheus/requirements.txt b/installers/charm/prometheus/requirements.txt
index f10a199..1a8928c 100644
--- a/installers/charm/prometheus/requirements.txt
+++ b/installers/charm/prometheus/requirements.txt
@@ -19,4 +19,4 @@
 # osm-charmers@lists.launchpad.net
 ##
 
-git+https://github.com/davigar15/ops-lib-charmed-osm/@e7f26cd29b322e175a23cadbe4546b7f2bbf111c
\ No newline at end of file
+git+https://github.com/charmed-osm/ops-lib-charmed-osm/@master
\ No newline at end of file
diff --git a/installers/charm/prometheus/tests/__init__.py b/installers/charm/prometheus/tests/__init__.py
index ca37e3b..446d5ce 100644
--- a/installers/charm/prometheus/tests/__init__.py
+++ b/installers/charm/prometheus/tests/__init__.py
@@ -27,7 +27,14 @@
 
 import mock
 
+
+class OCIImageResourceErrorMock(Exception):
+    pass
+
+
 sys.path.append("src")
 
 oci_image = mock.MagicMock()
+oci_image.OCIImageResourceError = OCIImageResourceErrorMock
 sys.modules["oci_image"] = oci_image
+sys.modules["oci_image"].OCIImageResource().fetch.return_value = {}